Container sealing machine



March 18, 1952 H. B. SILVER 2,589,740

CONTAINER SEALING MACHINE Filed April 27, 1950 15 Sheets-Sheet 1 Ame/vex March 18, 1952 s v 2,589,740

CONTAINER SEALING MACHINE Filed April 27, 1950 l5 Sheets-Sheet 2 $4M dzrze,

xM ima March 18 1952 H. B. SILVER 2,589,740

CONTAINER SEALING MACHINE Filed April 27, 1950 15 Sheets-Sheet 3 o I INVENTOR.

,4 WME/ March 18, 1952 H. B. SILVER CONTAINER SEALING MACHINE l5 Sheets-Sheet 4 Filed April 2'7, 1950 5244/ 5 f/zrae.

INVENTOR.

March 18, 1952 3 2,589,740

CONTAINER SEALING MACHINE Filed April 27, 1950 15 Sheets-Shet 5 667m 5 krte,

INVENTOR.

March 18, 1952 H. B. SILVER 2,589,740

CONTAINER SEALING MACHINE Filed April 27, 1950 I 15 Sheets-Sheet 6 IN V EN TOR.

H. B. SILVER CONTAINER SEALING MACHINE March 18, 1952 15 Sheets-Sheet 7 Filed April 27, 1950 kid/79735.

CONTAINER SEALING MACHINE Filed April 27, 1950 15 Sheets-Sheet 8 INVENTOR.

March 18, 1952 H. B. SILVER 2,589,740

CONTAINER SEALING MACHINE 15 Sheets-Sheet 9 Filed April 27, 1950 INVEN TOR.

6% /z f Abram =7 March 18, 1952 s v R 2,589,740

CONTAINER SEALING MACHINE Filed April 27, 1950 15' Sheets-Sheet 10 y i 11:11 w //W flaw IN V EN TOR.

March 18, 1952 H. B. SILVER CONTAINER SEALING MACHINE 15 Sheets-Sheet 11 Filed April 27. 1950 INVENTOR.

March 18, 1952 H. B. SILVER 2,589,740

' CONTAINER SEALING MAC'HINE Filed April 27, 1950 Y 15 Sheets-Sheet 13 March 18, 1952 H. B. SILVER 2,589,740

CONTAINER SEALING MACHINE Filed April 27, 1950 15 Sheets-Sheet 14 mnmvrae March 18, 1952 Filed April 27, 1950 H. B. SILVER CONTAINER SEALING MACHINE 15 Sheets-Sheet l5 Patented Mar. 18, 1952 UNITED STAT PATENT OFF atomic g CONTAINER SEALING Henry B. silver; Brooklyn, N; 'Y., assignor a Plastic Seal Corporation, BrockIym-N. Y... a corporation of. New Yor-k Application April '27, 1950. serial No. 158,365

Thepresent invention relates to amac'hine for sealing bottles and other containers, and more particularly to the type bywhich a. ribbon of viscous sealing material is discharged from a nozzle about the joint between thecap or other; enclosure and the body or neck of the container.

y "Still a further object hereof is to provide a sealing machine of novel and improved con structicn, of the class set forth, aifording various safety means to insure positive operation of corwherein the discharge nozzle is in: constant rotation about sealing position and yet will -discharge sealing material only when a bottle or containeris atsealing position. v

'Another object hereof is to provide a sealing. machine of the nature mentioned, wherein nozzle discharge pressure is automatically con-. trolled to insure uniform nozzle performance A-further object of this'invention is to provide a novel and improved sealing machine a set forth, which employs a constantly revolving discharge nozzle associated with mean to automatically shift the nozzle out of the path of bottles or containers already sealed or to be sealed. 7

Still another object hereof is to provide a machine of the character-set forth, of novel and improved construction, wherein the ribbon'ends of the seal effected, overlap each other to insure th'atthe joint protected is impervious to air and moisture.

Another object hereof is to provide a sealing machine of novel'and improved constructio'n' of the class described, which is adjustable for use for bottlesand similar containers of different sizes.

A further object hereof is to provide a novel and. improved sealing machine of the type do"- scribed, which properly positions and hold the container to be sealed at sealing position, and releases such hold in proper time during the cycle of machine operation, and further, insures. that such release takes place.

, Another object of this invention. is to provide a.

noveland improved sealing machine of the. kind described, which permits easy removal and're placements, of various parts subject to wear, and; requires a dismantling of a minimum number of pcrtstocccoinplish this i "tain included mechanisms in order to avoid damage to the machine which might otherwise occur if for some reason or-other, such mecha-- nisms fail to operate in the organized scheme of operation.

A further object hereof is topr'ovide a novel and. improved, fully automatic, high speed seal ingfmachine of the type mentioned, which. is

efficient in carrying out the purposes for which it is designed.

I Other objects and advantages will become apparent as this disclosure proceeds.

. In the accompanying drawings forming part of this specification, similar characters of referenceindicate corresponding parts in all the views.

Fig. I is a front view of a sealing machine embodying the teachings of this invention. In thi preferred embodiment, the main shaft is vertical and among other things, carries a cam gear and a nozzle gear; so namedfor col-men'- ience. The nozzle gear shown, is the lower one. Between the said gears, the main shaft passes through a main plate which is part of the framework.

Fig. 2 is a perspective view showing the principal framework of the machine with some associated components of a conveyor system for tran-sportating one bottle at a time to scaling position and away therefrom.

Fig. 3 is a central section through'the-main shaft, th gears it carries and shown also are various associated components.

' Fig. 4 is a magnified sectional view" of the upper part of the shaft shown in Fig. 3, showingin par; ticular a section through the packing box em ployed in the system for supplying viscous sealing material through the main shaft which affordsa passageway to the nozzle.

'of a' container-centering member movement to clear the closure of the container to besealed so that such closure is properly exposed tonozzle action.

8 is a: section through the nozzle carrymg bracket which is swingably'mountedon the'un ders'ide (l-tithe nozzle gear. Such-bracket also includes the nozzle valve, which is here also shown in section.

Fig. 9 is an end view of Fig. 8. Here can be seen the rack and gear employed to swing the nozzle-carrying bracket to and away from sealing discharge position relative the bottle to be operated on.

Fig. 10 shows the two halves of the nozzle proper. This view is in perspective.

Fig. 11 is a perspective view of a shim or gasket interposed between such nozzle halves on assembly.

Fig. 12 is a partly sectional view showing associated cam and follower means used to control the opening of the nozzle valve of Fig. 8.

movement towards and away from the main lower part. The movement of said two small upper cam parts are controlled by cam tracks on the underside of the cam gear.

Fig. 30 is a perspective View of a cam follower assembly associated with one of the movable cam parts included in Fig. 29; the cam follower associated with the other movable cam part being shown in Fig. 29.

Fig. 31 is a side view of a component shown in Fig. 30, serving as an auxiliary cam to insure lifting of the cam part controlled by the means otherwise shown in Fig. 30.

Fig. 13 is a partly sectional view showing as? sociated cam and follower means used to control the closing of the said nozzle valve.

Fig. 14 shows in perspective the mechanism illustrated in Figs. 12 and 13 in operative relation with the nozzle valve, and also includes means which permits the opening of such valve only when a bottle is in sealing position.

Fig.15 is a diagrammatic view of thesystem employed to feed viscous sealing material from a hopper to the main shaft from whence it gets to the nozzle. Also here-included is a means to control the pressure of such supply fiow.

Fig. 16 is a perspective view of such pressure control means. v

Fig. 17 is a section taken at lines li t! in Fig.16.

Fig. 18 is a section taken at lines 18-48 in Fig. 16.

Fig. 19 shows means used to open and close valve mechanism included in the pressure control means illustrated in Fig. 16.

Fig. 20 is a top view of Fig. 19.

Fig. 21 is a perspective view of one of the parts included in the assembly shown in Fig. 19.

Fig. 22"isv an enlarged perspective view of the rack and gear set shown in Fig. 9, as well as of the bracket slidably supporting said rack. Also included is an indexing means for holding the nozzle in its-extreme position. It might here be noted that movement of said rack is controlled by a special cam means, the cooperating follower of which is here shown carried on the rack.

Fig. 23 shows the rack bracket included in Fig. 22. Such bracket is shown mounted on the underside of the nozzle gear. This gear has a suitable opening for the rack to slide therethrough. Fig. 24 shows the spring-loaded engagement member which cooperates with the index disc for holding the position of the nozzle-carrying bracket.

Fig. 25 shows the front view of a one piece cam structure used to make the special cam.

means for controlling the rack movement.

Fig. 26 is a plan view of Fig. 25. Fig. 27 is a side view of Fig. 26. Fig. 28 is a development of the surface of this cam structure, and in this view is indicated the manner of cutting same into several parts which shall serve as the special cam means for controlling the rack movement.

Fig. 29 is a perspective view of the rack-controlling cam means which was made of the original one piece structure illustrated in'Fig. 25. Such cam means comprises two movable elements which are relatively small, and positioned above a main cam part. parts are, mounted for independent. vertical Said two small cam Figs. 32 and 33 are development views of the cam means of Fig. 29, shown in different conditions during operation. These views will aid in explaining the operation of said cam means.

. ,Fig. 34 is a top plan view of the main plate included in the framework of this machine, showing preferred locations of the apparatus mounted thereon. This layout is different from that shown in Fig. 1 where the respective posi: tions of the parts have been chosen to attain better clarity in illustration so that pertinent parts appear separate instead of behind one another.

In the preferred embodiment of this invention shown in the drawings and particularly referring to Figs. 1 and 2, a table is part of the machine's framework which includes the stationary vertical posts 5| carrying fixed at their top ends, the plate member 52. These posts arranged one at each side in front and one in the rear of the machine, carry a slidably mounted carriage structure whose position along such posts is adjustable by manipulation of a handwheel 53 journalled atop the plate member 52, and in threaded engagement with the upwardly positioned screw 54 extending from the top member 55 of the carriage structure. The bottom member of said carriage is a horizontally positioned plate member 5t mounted on all the posts 5|. Said member 56 will hereinafter be called the main plate. It is connected to the upper member 55 by the three rods 45, on two of which is fixed a bridge piece 58 intermediate said top and bottom carriage members.

A vertically positioned round tubular member 59. having an outward flange 59' intermediate its ends, is fixedly mounted on the main plate 55 as shown in Fig. 3, and extends through the circular hole 60 in said plate. Suitably seated bearings BI and 52, at top and bottomof the member 59 and housed therein, serve the main shaft denoted generally by the numeral 63, which extends through said member 59. A gear 64,

.numerals 61, 68 and 69 are threadedly engaged lock rings, while-ring i0 is of suitable material to act as bearing surface for the face of the hub of the cam gear 66. -The ring 61 is threadedly engaged on the top end of the mainshaft 63 and otherwise, suitably keyed thereto my other releasable means not shown such ring serving to hold the main shaft mounted. The nozzle gear 64 and the cam gear 66 are driven from a main power shaft 'H which is mounted vertically and has a longitudinal slot '32 which permits sliding movement of the sleevev l3 suitably keyed v on such shaft TI and journalled to the main plate 56. This ,slee've' carries a gear 14' which is in constant engagement with the cam gear 66, and. also a gear which is in constant engagement with the nozzle gear 64. Itis evident that this gearcari'ying sleeve 13 will move along rod 18, adapted to be lowered to hold the centered bottle in true sealing position, while the centering cup is raised to permit the nozzle designated generally by the numeral 10- to do its work. The lower end of rod 18 is provided with asoft metal tip 80 so as not to mar the cap 8| which closes the mouth of the bottle 82 being, operated on.

The upper portion 63' of the main shaft is of reduced diameter and at its junction with the remainder of. such main shaft, has surrounding it, an annular space 03. Opening in the bottom end of the said main shaft 63 is a vertical bore 84 reaching only t6 the region of the annular space 83, and made communicative with said anniilar space by means of a duct 85. To drill this duct 85, it was made the continuation of the hole later tapped and plugged at 8B.

Said upper portion 63' of the main shaft, has its own upper portion slightly reduced and ex teriorly threaded, for engagement by the top end of a sleeve member denoted generally by the numeral 81 positioned about said upper portion .63 of the main shaft; Said sleeve member rotates with said shaft, and is capable of being unscrewed and removed from said shaft, whenever required to be replaced when worn in the packing box 88. It is best to provide said sleeve member'with a flange 87' to attain a secure join-t against leakage.

Further as shown in Fig; 4, said sleeve member 81, intermediate its ends, has the diametrically opposite holes 89 and 90 through its wall. Above these holes, the said sleeve and the main shaft portion 63' are in snug fit to avoid any leakage between them at their top ends. From above these holes 89 and 90, and all the way downward through the sleeve member, there is an annular space 9| between said sleeve and shaft portion, which space is a communicativeextension of the annular well 83. It is evident that any's ealing fluid in space 92 in the packing box 88, is free to flow through the holes 89 and 90 in the sleeve member 81, into the annular space ehthence into the annular space or well 83, the duct 85, then downwardly in bore 84 in the main shaft 63, and then finally to the nozzle valve 93 controlling the flow to the discharge nozzle 19.

The preferred construction of the sleeve member 8'! is shown in Fig. 6, where for the greatest part of its length it is of uniform outside diameter, but the thickness of wall below the holes 89 and 90 is less than above them, in order that the annular space 9!v be formed when saidtsleeve is mounted on shaft portion 63.

The packing box 88 is made of two identical halves 94 and 95, which when'a'ssembled form. a casing having three annular races, one abovethe other, and respectively designated by the numerals' 96,92 and 91. The upper and lower races Qtand $1 hold packing 98 and 98. Each such part 94 and as, has a threaded hole mo to re:-

ceive'ends of respective'pipes IOI and I02, also th'c holes I03 to hold bolts to effect assembly, as

well as the flange parts 94 and sothat the packing box can be mounted depending fiomthe underside of thebridge piece 58, so that'hol'e I04 .therethrough can act as a well for'oil, into which wellthe joined upper ends of the shaft portion 63' and its sleeve member 01 protrude; Said sleeve shownin Fig. 4, is in bearingcontact with the inner semi-circular concave edges of the ribs or' partitions I05 and I06. The dished member I01 acts as an oil reservoir under the packing box. 38 onto which it is detachably mounted by means of the screws I08. The numeral I09 in.- dicates a washer of packing material suitably cemented to lie in the central hole in said oil reservoir I01, through which hole the sleeve-is in contact with said ring or washer I09; It is evident that to remove and replace the packing or the sleeve member, all that is necessary; is; to dismantle the packing box 88 which is a; simple matter, and does not require the removal of the main-shaftand in no manner molests or upsets the adjustment of the bottle centering mechanism.

Referring to Figs. 1, 3, 8 and 9, it is noted that on the underside of the nozzle gear 64 are carried two brackets I I0 and I I I, which serve for swing ably mounting thereon the nozzle bracket 2 carrying a gear II3. Also, on the underside of said nozzle gear, near .an opening therethrough denoted in Fig. 23 by the numeral I I4, is mounted a bracket H5, on which is slidably supported a vertically movable'rack member II6.. This rack is in engagement with the gear .3, extends through the opening I I4 aforesaid, and carries a roller H8 which acts as a cam follower controlled by a cam means shown in Figs. 1 and 29. This cam means which will be later described infd'e tail, consists principally of the cam parts II-9 I29 and I2-I which cooperate in a special manner. Cam part H9 is fixed to the underside of the main plate 56. Cam parts I20 and IZ I are posi: tioned under said plate and are independently movable towards and away from, in vertical di rection, in relation to the cam part II-9, which is below them. Follower I22 is adapted to control the movement of cam part I20. A follower means I23 shown in Fig; 30, is used to control the movement of the cam part I2I. Of course, separate. cams cooperate with the follower. devices I-22 and I23, aswill be set forth. f

Extending from the upper face of the cam ear 55, are two concentric cam tracks denoted by the numerals I24 and. I25 respectively. Ex.- tending from the underside of said cam gear, are four concentric cam tracks denoted by the nu merals I 25, I21, I28 and I29 respectively. All six mentioned cam tracks on the cam gear are ring mounds which arecircular on the faces of the gear respectively, of varying heights from the face of the gear, as is well known in the machine art to raise and lower a co-operating follower so as to give the follower a predetermined movement, and to actuate the followers in a predetermined timed relation.

Follower means'lt i cooperates with cam track i2 3, to ra ise and. lower the tubular memberj. 1.8 which carries the bottle-centering cup 11.. The follower means. I3I cooperates with cam, track to raise and lower the holdv-down rod- 78. The numerals I38 and i-SI' denote rollers at t e lower ends respectively of the vertical, axig- {231 iliitlailidXQQiSJ32 and I33, whichare post;-

tioned through bosses integral of the bridge-piece 58. These rods are pivotall y pinned to, and in their movement are respectively adapted to give movement to the beams I34; and I35 which are pivotally mounted on said bridge piece. In turn, said beams are pivotally engaged in suitable manner to the members 16 and 18 respectively. The numerals I36 and I31 designate tension coil springs which hold the rollers I30 and I3I in constant contact with their associated tracks. Should spring I36 break aceidently while the machine is running, the nozzle 19 would" hit against the centering cup 11, and considerable damage would occur. This .i s prevented with certainty because of the presence of an auxiliary means I39 mounted on the upper face of the cam gear 66, and the cam roller- I38 carried on the rod I32, because said rod will be brought downward to raise the centering cup out of the locus of movement of the nozzle 19, when said roller I38 passes under the downwardly sloping cam face I39. (SeeFig.7.)

Follower means I40 shown'in Figs. 1, 12 and 14, cooperates with cam track I28, to shift cam means I4I which is atop thenozzle gear 64, to open the nozzle valve 93. The follower means I42 shown in Figs. 1, 13 and' 14, cooperates with the cam track I21, to shift cam means I43 which is atop the nozzle gear 64, to shut said nozzle valve.

Follower means I22 shown in Figs. 1 and 29, cooperates with cam track. I29 to accomplish movement of the cam part I20. Follower means I23 shown in Fig. 30 and indicated in Fig. 1, cooperates with the cam track I26 for movement of the cam part I2 I. As mentioned, said cam parts in'cooperation with the cam part II9-, determine movement of rack H6 and hence of the swing of the nozzle 19 to and away from sealing position. As an auxiliary means to assure nozzle swing away from sealing position, in order to avoid damage to the machine if for any reason such cam part movement does not occur when required due to spring failure, there is the member I44 depending from the cam gear 66. Such member presents the upwardly sloping cam face I44 which when contacted by the auxiliary roller I45 on the follower means I23, will effect the raising of the cam part I2I (see Fig. 30).

Referring to Figs. 12, 13 and 14, it is to be noted that when the roller I46 of the follower means I40, is in lowered position as shown in Fig. 12, it will contact the vertical surface of the cam projection MI, and due to the rotation vof the nozzle gear 64, the shaft I48 will turn afraotion of a revolution and cause arm I41 to contact and shift the slide rod I59 of the nozzle valve 93, to open position for sealing substance to enter the nozzle 19. When the roller I89 of the follower means I42 is inlowered'po'sition as shown 3 in Fig. 13, it will contact the vertical surface of the cam projection I43 and due to the rotation of the nozzle gear 64, the shaft I56 will turn a fraction of a revolution and hence arm II will contact and shift the slide rod I59 back to closed position whereby the supply oi sealing substance is cut ofi t0 the nozzle 19. Arms I51 and I58, connected by a tension coil spring 49, are fixedly carried on their respective shafts I48 and I50, and travel "between adjustable stops (not shown) on the underside of the nozzle "gear 64. As soon as the rollers I46 and I49 cease contact with the respective cams MI and I43, the tensed spring 46 will return said cams to their original positions respectively. Adjustable bolts I56 and I55 are provided on the slide-shifting arms I41 and I5I, to determine movement of the valve slide rod I59.

To accomplish that; the nozzle valve 93' remain closed when and if there is no bottle in sealing position, the follower means I40 is of such construction that downward movement of the mem ber I carrying the roller I46 is not permitted unless there is a bottle at sealing position. Therefore note the vertically positioned rotatable rod shaft I6I carrying the laterally extending bars I62 and I63. The said bar I62 terminates in a block I64 which is normally maintained positioned in contact and between the flange I6I' and plate 56, which prevents downward movement of member I60, and the position of said block is so maintained by the stressed tension coil spring I66. The bar I63 is suitably shaped and dimensioned that when a bottle comes into sealing position, said bottle will have moved the bar I63 to turn the rod shaft I6I whereby block member I64 is shifted away as in Fig. 14, so that member I60 is free to be moved. In Fig. 14, the bar or arm I63 is behind the bottle, and contacting same. As soon as the bottle at sealing position moves away, the spring I66 will return the block member I64 for positioning itself between the flange I6 I and the plate 56.

In Fig. 12, the vertically positioned tubular body member I61 is securely positioned through a suitable opening in the main plate 56, and has the outer flange I61, and also the internal tubular liner I68 in which is free to slide in piston-like manner, the lower portion of the member I60. The upper portion of this member I60 is bifurcated. The tines I6I have longitudinal slots I10 to serve as tracks for a pin bolt I1I extending from each end of the fork I12 carrying the roller I 13 which is maintained in constant contact with the cam track I28 on the cam gear 66, by means of the rather strong compression coil spring I14 in the hollow I15 of the member I 60. In this hollow, piston-like, is the downward shank I16 of fork I12. The numeral I11 denotes a rather weak spring between flanges I61 and I6I.

While block I64 is in position holding part I60 from downward movement, any downward movement of shank I16 due to action of cam track I28, will only cause the spring I14 to be stressed, and of course maintain roller I13 in constant contact with said cam track. When block I64 is moved away to permit downward movement of part I60,

any downward movement of the shank I16 due to action of the said cam track I28, will in turn cause downward movement of part I60 to lower the roller I46 into the'path of cam I4I the stiffness of spring I14 being sufficient to allow this to occur. Spring I11 serves to shift part I60 upward upon upward movement of the shank I16, so that block member I64 may swing into position between the flanges I6I and I61. So that roller I13 be in proper position with respect to the track I28, part I60 is maintained against axial rotation by means of the fixed pin I which is free in vertical groove I8I cut in the wall of the part I60.

In Fig. 13, the numeral I82 designates the shank of a holder I83 of the roller I84 which contacts the cam track I21 on the/underside of the camgear 66. This shank I 82 extends downwardly through a suitable boss I85 on the main plate 56, and is slidable therethrough within the liner I86. This shank carrying roller I81 at its lower end, is maintained against axial rotation by means of the fixed pin I88 free in the vertical to as to have a nozzle I9 mounted onto its lower end, and so that its upper portion may serve as a shaft to be journalled in suitable brackets HQ and II I, and extend through one of such brackets,

where as such shaft, it carries gear I I3 and a disc member I9I. Also, the body of said casting "shall 1) include intermediate said top and bottom pertions thereof, a suitable structure to serve as the control valve 93. In the construction illustrated; the underside serving as a base for the nozzle is horizontal, the axis of the shaft portion I19 is horizontal and thecontrol valve 93 has a horizontal sliderod, parallel with the axis of rotation of said shaft part. The brackets He and III are secured depending from the underside of the nozzle gear 64. Said bracket casting is provided with a bore I92 which is communicative with the nozz-lede'sighated generally by the numeral 19, and with a horizontal bore in its Tniddl part, through latter extends the slide rod I59 of the control valve 93; both said bores bein in communicationwhenth'e slide rod I59 is shifted so that its reduced section IE5 is at the intersection of both said bores in the nozzle bracket. in the conditlonshown in Fig. 8, the valve 93' is closed. The upper-portion of said bracket casting may be made of two parts I93 and I94, held together by bolts I 95, and rotatably mounted on the tubu lar member I96 which is fixed throughthesup porting bracket III, is communicative with the bore I92, and by piping I91 shown in Fig.1, is connected to lower opening 84' of the bore 84 in The nozzle 19 is made u of the parts shown Fig. 10, and consists of the two halves I98 and $99, which are assembled with a shim 203 between them to make a leak-proof unit, affording the discharge orifice 201. The nozzle halves, in their meeting surfaces, present an L-shaped channel,- which if without the shim in assembly, would be closed at discharge end of the nozzle. The cutout m' in the front edgeof the shim, permits the nozzle discharge-to be in proper ribbon form, and when the nozzle is at sealing position, such ribbon is discharged horizontally in a vertical plane.- The passage in the nozzle, when the nozzle is assembled and mounted, is of course communicoitive with the lower opening of the" bore I92. It is'evident as shown-in Fig. 9, that when the rack H6 moves downward, the" nozzle 19 will be away fromsealing position. When the rack" moves upward, the nozzle will beswung intoseali'r'ig 'position where the discharge opening 201 accomplishes ribbon discharge in a verticai'plahe. i e-permit some adjustment or nozzle position,- the slots 2:74 be provided. The ntour of nozzle discharge fSICf is" preferably lil'id to doliform with that of the container region its'ets "ad jac'e'nt to.- other incidents of nozzle design "are described in prior art hereinafter mentit ined. Tt'i's pertinent to note that the present struc: ture,th'e channel end elements I98 and I99, if worn or damaged, permit repair of the nozzle halves by mereiy rmaing or otherwise surfacing I are in congruent relation on 10" these nozzle halves't-rue so that the shim-alone determines nozzle opening.

Fig. 15 shows a system for sealing supply and for the control thereof. The numeral ZOE-denotes a rotary pumpwhich forces sealing substance from the hopper 206 through a filter 201 to insure a uniform consistency. From the filter, such substance enters another rotary'pump 208 which discharges through pipe I02 into the annular space 92 within the packing box 88', and from there such substance as can be seen in Fig; 4-, passes through the holes 89 and 96, into space 9| and then into space 83.111101; 85, down passage Way 84 inmain shaft 63, thence through piping I91 into the nozzle bracket II2, down through the bore I92, and is there controlled by valve 93 for final discharge through the nozzle 79.-

A pressure control means designated generally by the numeral 2E0, and to be described hereinafter, has two port openings, to which connec tionsare made by-the pipes 2-69 and 2H, respectively. The pipe 269 is directly connected to pipe IBI which leads to the space 92 in the packing box 83. A pipe 2I3, having a hand-con trolled valve 2M interposed therein, connectsto pipe 2 and to theintake port of the se'corfld pump 2-08, Piping 2-I5 affords a passage from the pipe H3 at a point between the valve and pipe 2| I, to the intake port of the first pump-205.-

Gears 2H5 and 2H on the pump rotors, are engagement and are driven by or from the her-i zontally positioned shaft 2I9 mounted atop the main plate 56 in suitable bearings 2 I 8. Said shaft 219 is drivenfrom the main power shaft II, by

,' gearing not shown, which drives the bevel gear 220 carried on the said shaft 2 I 9.

The control means 2m may have a metal block body 22I. for various valve mechanisms arranged in a special functional relationship as will beset forth. Referring to Figs. 16 through 21, the numeral 222 is a bore within said block body, in which is properly fitted a valve slide rod 223 having an intermediate reduced section. This rod. extends'out ofsaid body where said rod .terminates in a plate member 224 which is vpivotally mounted tosaid rod by means of an axis pin 225; This plate has an elongated hole 226 therethrough intermediate two other holes 22'! and 228; Said plate is loose on the shaft ZIQ which drives the pumps; saidshaft being through the middle hole 226. The cams 229 and 23s are carried on the shaft 2I9, one at each side of the plate member 224. A roller 23! is carried on one side of the plate on a stud pin 232 fixed in hole 22?. Another roller 2-33 is carried on the other side of said plate gnezmber 224, on a stud pin 234 fixed in the hole 2 rotates. is to reciprocate the slide rod 223 a definite amount.

It is to be'noted that the movement of said valve slide rod 223 is-intermittent, and occurs only upon contact of one of the cams and its related roller. When said cams 229 and 2-38 the shaft 2I9, said slide rod 223 will be in open position during half of each revolution of said shaft, and in closed position during the other ha'lf. However, by altering the angular relation of the positions of said cams on shaft 2I9, the ratio of time in open position to the time in closed position aforementioned; may be changed. Also to be noted, is that the useof 'a non-rigid connection'for associating the valve slide rod v.223 to the. shaft2l9, avoids the ne:-.

substance,

The action of the cams when shaft 2I9- 

